John Martin Reservoir

Bent County, CO

MAYBEConfidence · Medium
Best bite window
The highlighted window has passed. This read is still based on the latest cached weather; use the 7-Day forecast below for the next window.
Main reason
falling pressure ahead of a system
Main risk
a front passing through

MAYBE on John Martin Reservoir — light winds and falling pressure ahead of a system for this window. Watch a front passing through. Weather-only read (no on-water history calibrating this yet).

Next forecast window
MAYBE

Fri · Jul 24, 4 AM → 8 AM (America/Denver)

Full read

The latest cached fishing-weather read for John Martin Reservoir in Bent County, CO is MAYBE. Its highlighted window has passed, so use the 7-day forecast below for the next available window. The main factor in its favor was falling pressure ahead of a system, while the main watch-out was a front passing through. Its cached forecast evidence included wind near 7 mph out of the northeast, gusting to 17 mph; surface pressure near 882 hPa on a falling trend; 0.00 inches of rain; and air temperature near 73 °F with clear dominant. Confidence in this cached read is medium; it was generated July 23, 2026, 10:38 AM UTC, and reads refresh on a daily cadence. This is a weather-only read built from forecast weather; it does not yet use on-water reports, and confidence is capped until local water data or feedback exists.

UPDATED July 23, 2026, 10:38 AM UTCBUCKET 2026-07-23ENGINE 0.7.0

Conditions at a glance

Wind
7mph

NE · gust 17

Rain / Weather
0in

Clear

Temp
73°F

23°C · hum 65%

Pressure
26.05inHg

Falling

7-Day Fishing Forecast

One read per day — the bite call, the window, the weather behind it

  1. Thu · Jul 23
    Window passed
    MAYBE
    A front passing through
    100° / 70°F
    7 mph · NEgust 31
    0.02 in
    ↓ +3.0 hPa
  2. Fri · Jul 24
    4 AM → 8 AM
    MAYBE
    A front passing through
    102° / 70°F
    6 mph · Wgust 19
    0.00 in
    ↓ -3.4 hPa
  3. Sat · Jul 25
    8 AM → 12 PM
    MAYBE
    A front passing through
    106° / 77°F
    4 mph · SEgust 30
    0.00 in
    ↓ -3.6 hPa
  4. Sun · Jul 26
    4 AM → 8 AM
    MAYBE
    A front passing through
    108° / 81°F
    6 mph · SWgust 27
    0.00 in
    ↓ -3.2 hPa
  5. Mon · Jul 27
    4 AM → 8 AM
    MAYBE
    A front passing through
    109° / 81°F
    7 mph · NWgust 33
    0.01 in
    ↓ +0.9 hPa
  6. Tue · Jul 28
    4 AM → 8 AM
    MAYBE
    A front passing through
    106° / 77°F
    4 mph · Wgust 30
    0.12 in
    ↓ +2.3 hPa
  7. Wed · Jul 29
    4 AM → 8 AM
    MAYBE
    A front passing through
    99° / 75°F
    3 mph · NEgust 29
    0.00 in
    ↓ +1.6 hPa

Last 3 days

Recent context — what just happened

Pressure
Steady
-0.8 hPa over 72h
Rain
Dry stretch
0.00 in totallast 72h
Wind
Gusty
11 mph · gust 35 · E
Temperature
Warmer
+7.2°F over 72h108–68°F range

Weather-only read. Confidence is capped until local water data or feedback exists.

About John Martin Reservoir

John Martin Reservoir, in Bent County, CO, is Sometimes called a sapphire on the plains.

Elevation
3,851.87 ft
Managing agency
U.S. Army Corps of Engineers (owns/operates dam and reservoir); recreation managed by Colorado Parks and Wildlife under lease
Dam
John Martin Dam (Arkansas River)

Primary species: White bass, Hybrid striped bass, Black crappie, Saugeye, Walleye, Largemouth bass, Channel catfish, Freshwater drum, Flathead catfish, Blue catfish, Smallmouth bass, Bluegill.

Nearby waters

Weather data by Open-Meteo — CC BY 4.0. Fishing Weather derives the fishing read.